diff --git a/runtime/doc/editing.txt b/runtime/doc/editing.txt
index 371450f..5c4b61a 100644
--- a/runtime/doc/editing.txt
+++ b/runtime/doc/editing.txt
@@ -1650,6 +1650,11 @@
 			if it exists now.
 			Once a file has been checked the timestamp is reset,
 			you will not be warned again.
+			Syntax highlighting, marks, diff status,
+			'fileencoding', 'fileformat' and 'binary' options
+			are not changed.  See |v:fcs_choice| to reload these
+			too (for example, if a code formatting tools has
+			changed the file).
 
 :[N]checkt[ime] {filename}
 :[N]checkt[ime] [N]